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https://issues.apache.org/jira/browse/KAFKA-17397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18052865#comment-18052865
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sanghyeok An commented on KAFKA-17397:
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Hi [~kirktrue], I did self-assign.
I investigated an issue where {{ClassicKafkaConsumer}} occasionally fails to
send the {{LEAVE_GROUP}} request to the {{GroupCoordinator}}
due to a non-deterministic path, and I have prepared a patch to fix it!
When you get a chance, Please take a look this PR. :)
https://github.com/apache/kafka/pull/21332
> Ensure ClassicKafkaConsumer sends leave request on close even if interrupted
> ----------------------------------------------------------------------------
>
> Key: KAFKA-17397
> URL: https://issues.apache.org/jira/browse/KAFKA-17397
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer
> Affects Versions: 3.8.0, 3.9.0
> Reporter: Kirk True
> Assignee: sanghyeok An
> Priority: Major
> Labels: integration-tests
>
> During testing for KAFKA-16985, a new, parameterized integration test was
> added to {{PlaintextConsumerTest}} named
> {{{}testCloseLeavesGroupOnInterrupt(){}}}. When the test is executed locally,
> it passes using both the {{AsyncKafkaConsumer}} and the
> {{{}ClassicKafkaConsumer{}}}. However, when the test is run in the Apache CI
> environment, it passes for the {{AsyncKafkaConsumer}} but fails for the
> {{{}ClassicKafkaConsumer{}}}. Rather than hold up KAFKA-16985, this Jira was
> filed to investigate and fix the {{{}ClassicKafkaConsumer{}}}.
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